Hydraulic governor



(No Model.)

E. J. WOOD. HYDRAULIC GOVERNOR.

No. 436,164. 1 Patented Sept. 9, 1890-,

lllllll runuruuuitf HVHIIIIIII UNITED STATES PATENT EErcE.

EDGAR J. WOOD, OF BROOKLYN, NEW YORK.

HYDRAULIC GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 436,164, dated September 9, 1890.

Application filed March 12, 1890. Serial No. 343,625. (No model.)

To all whom it may concern.-

Be it known that I, EDGAR J. 00D, of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvementin Hydraulic Governors,

of which the following is a specification.

My improvement relates to an improvement in hydraulic governors.

The object is to provide a sensitive and effective governor for controlling the speed of motors in general, and particularly well adapted to use in connection with motors of great horse-power.

In the accompanying drawings, Figure 1 is a plan view of the governor. Fig. 2 is a side elevation of the same, and Fig. 3 is a sectional view in detail of one form of check.

A represents a pumpin the present instance a rotary pumpits shaft being provided with suitable pulleys a a by which motion may be imparted to the pump from the steam-engine or other motor. (Not shown.)

'From the discharge side of the pump a pipe B leads, and after completing a circuit of convenient extent returns to the feed or suction side of the pump, the said return portion of the pipe being designated as B. In the form in which the governor is here presented the pipe B B is intercepted intermediate its ends by a cylinder 0, in which a reciprocating piston c is fitted and located above the entrance I) and exit I? of the pipe B B. For the purposes of this invention a diaphragm free to vibrate might be substituted for the piston as its substantial equivalent. The piston c is supposed to be connected with the valve or other device which controls the admission of the motive fluid to the motor. The pipe B B, comprising the pump and the cylinder C as a part of the endless circuit, are supposed to be filled with a liquid-glycerine, for example-the act-ion of the pump tending to keep up a constant circulation of the liquid around the circuit. As the motor increases its speed above that at which it is intended to run, the speed of the pump will be increased, and under its impulse a wave of pressure will follow along the pipe B, and upon reaching the cylinder 0 will act upon the piston a, moving it, and through its connection with the motor-controlling devioewillshut oif the supply of force and reduce the speed. It is assumed, of course, that the piston c is so weighted or placed under such tension as to assume its normal position as the speed of the pump is reduced.

' In order to check to a greater or less degree the free flow of the liquid through the circulation-pipes B B, and to arrest the wave of pressure to cause it to act with a greater degree of positiveness upon the piston, it is found desirable to insert in the circuit a retarding device located between the reciprocating part and the suction or supply side of the pump. The form of retarding device here shown consists of a pipe-section D,having an enlarged chamber d formed therein, a tubular diaphragm E being projected into the chamber from the exit end thereof. The end 6 of the tubular diaphragm is closed, and said diaphragm is provided with openings (2 through its opposite sides.

Valves f, secured to a valve stem F, are adapted to close to a greater or less degree the openings e, as follows: An opening 9 is formed through'the wall of the pipe-section D in line with the openings e, the same being surrounded by a boss G. The valve-stem F has formed integral therewith or secured thereto a plunger f, which fits with a free sliding movement the bore or opening g. The lower or outer end of the plunger f is provided with a seat f for the reception of one end of a spring H, the opposite end of the spring being seated in a cap I, adapted to be adjusted on the boss G, preferably having a screw-thread connection therewith, as this furnishes a simple and effective means for regulating the tension of the spring H. A pressure-gage K is also conveniently attached to the pipe-section D on the side opposite the plunger-seat. The spring H is adjusted to hold the valves f at such a distance from their seats as to allow the free circulation of the liquid under the normal speed of the motor and pump. As the speed increases above the normal, the increased pressure or wave of pressure, as I have been pleased to term it, upon reaching the retarding device acts upon the plunger f to depress it, and thereby partially close the valves, retarding the flow and causing the pressure to react upon A safety-valve L is attached to the pipe B leading from the pump to guard against unusually-high pressure suddenly arising from any cause, and to provide for any escape or overflow of liquid which might result from the opening of the safety-valve a branch pipe B leads from the safety valve chamber around to and communicates with the pipe B at the suction or feed side of the pump, thereby returning such escaped liquid again to the circuit.

A supply-reservoir M of liquid is in communication with the pipe B at the suction or feed side of the pump to supply any loss which might occurfrom leakage or otherwise, and thus keeping the circuit-pipes B B at all times full.

hat I claim as my invention, and desire to secure by Letters Patent. is

1. In a hydraulic governor, an endless liquid-conduit comprising pipe-sections, a pump inserted between two sections and forming a part of the conduit, and a cylinder inserted between two pipe-sections and provided with a reciprocating diaphragm or piston, the said cylinder forming a part of the conduit, suhstautially as set forth.

2. In a hydraulic governor, an inclosed endless liquid-conduit, a pump comprised within the circuit of the conduit to circulate the liquid, a reciprocating diaphragm or piston under the influence of the variations of the pressure of the circulating liquid, and a retarding device located in the conduit hetwcen the reciprocating diaphragm or piston and the suction side of the pump and actuated by the impulse of increased pressure of the liquid within the conduit, substantially as set forth.

3. In a hydraulic governor, an inclosed endless liquid-conduit, a pump comprised within the circuitof the conduit to circulate the liquid, a reciprocating diaphragm or piston under the influence of the variations of the pressure of the circulating liquid, and an adjustable retarding device actuated by the impulse of increased pressure of the liquid within the conduit and located in the circuit, substantially as set forth.

at. In a hydraulic governor, the combination of the endless liquid-conduit comprising in its circuit the actuating-pump and a reciprocating diaphragm or piston, a safetyvalve in connection with the conduit, and a branch pipe leading from the safety-valve chamber to the conduit at the suction or feed side of the pump, substantially as set forth.

EDGAR J. WOOD. IVitnesses:

FREDK. HAYNES, D. II. HAYWOOD. 

